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Finding the Fourth Proportional to 8,811.20, 13,216.80 and 4,131.20

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Solution

The fourth proportional to 8,811.20, 13,216.80 and 4,131.20 is: 6,196.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,811.20 : 13,216.80 = 4,131.20 : x
  2. Step 2: Convert to fraction form
    8,811.20/13,216.80 = 4,131.20/x
  3. Step 3: Cross multiply
    8,811.20x = 13,216.80 × 4,131.20
  4. Step 4: Simplify right side
    8,811.20x = 54,601,244.16
  5. Step 5: Solve for x
    x = 54,601,244.16/8,811.20
  6. Step 6: Final answer
    x = 6,196.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.